<% value = 'string' unless defined?(value) %>

```json
[
  {
    "id": "string",
    "value": "<%= value || 'string' %>",
    "feed_id": 0,
    "feed_key": "string",
    "created_at": "datetime",
    "location": {},
    "lat": 0.0,
    "lon": 0.0,
    "ele": 0.0,
    "created_epoch": 0,
    "expiration": "datetime"
  }
]
```
